Leaking differential oil from the inter axle switch in the cab can one help

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Michaelk910, Feb 14, 2021.

  1. Michaelk910

    Michaelk910 Bobtail Member

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    Feb 14, 2021
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    I noticed gear oil leaking from behind the dash so I took the dash apart and noticed oil leaking from the actual lock and unlock differential axle switch can one tell me what could cause the switch to leak
     
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  3. AModelCat

    AModelCat Road Train Member

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    Drain your air tanks and see if there's oil in them. Could be engine oil in the air system from the compressor.
     
  4. mtoo

    mtoo Road Train Member

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    What @AModelCat says
     
    650cat425 Thanks this.
  5. Goodysnap

    Goodysnap Road Train Member

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    The orings are leaking in the differetial lock cylinder. Apply the lock and see if air is leaking into the differential indicating that fluid might go the other way.

    Also check the axle vent for plugged. If air cant escape as it warms, the pressure takes the path of least resistance and may be forcing fluid up to the switch.

    Gear oil has that special wang to it...
     
  6. jwsweet1979

    jwsweet1979 Bobtail Member

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    Diff lock solenoid is leaking. Do just as Goodysnap suggested. I've had this issue myself, just like you are describing.
     
  7. Michaelk910

    Michaelk910 Bobtail Member

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    Feb 14, 2021
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  8. Michaelk910

    Michaelk910 Bobtail Member

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    Where would the solenoid be located
     
  9. Michaelk910

    Michaelk910 Bobtail Member

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    Feb 14, 2021
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    What
    what did u do too fix it
     
  10. Cattleman84

    Cattleman84 Road Train Member

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    In the differential.
     
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